Write a scene where one character wants something and have another character represent the obstruction to that want. Make the want anything, examples of which might include love, a penny, a sister, a shirt , a job, sex, marriage, financial success, a spoon. You can try to resolve the scene or leave it unresolved so you can add to it later. Be overt about the need or be subtle about it. Make sure you use visual and sense-based details, including dialogue to reveal the conflict. (Dr. Greg Oaks)